Date: Wed, 30 Sep 2015 00:42:57 +1000 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Arthur van der Peijl <aavanderpeijl@gmail.com> Cc: Kevin Oberman <rkoberman@gmail.com>, John Baldwin <jhb@freebsd.org>, "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org> Subject: Re: ACPI problems op ASrock Message-ID: <20150930000154.E67283@sola.nimnet.asn.au> In-Reply-To: <AC265A92-ABE2-442B-9959-EC8F61DFC2C6@gmail.com> References: <49E6B533-4457-4583-82A2-9940C291AB51@gmail.com> <CAN6yY1s1akH6Wva-1eyYt3AZWRvvE%2BiSLtydDdfc01OwwOaZwg@mail.gmail.com> <AC265A92-ABE2-442B-9959-EC8F61DFC2C6@gmail.com>
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On Sat, 26 Sep 2015 10:17:20 +0200, Arthur van der Peijl wrote:
> Thank you for assistance: powerd must clearly not be my focus: the
> CPU stays high and thus cannot go into idle mode.
> No need to change performance_cx_lowest as I just have a Pentium
> G3220 running.
>
> [root@zfsguru /home/ssh]# cat /boot/loader.conf | grep hint.
> hint.p4tcc.0.disabled="1"
> hint.acpi_throttle.0.disabled="1"
>
> Tried to change lowest level on running system:
>
> [root@zfsguru /home/ssh]# sysctl dev.cpu.0.cx_lowest=C8
> dev.cpu.0.cx_lowest: C8 -> C8
You really need to set hw.acpi.cpu.cx_lowest=C8 instead; this is then
propogated to dev.cpu.*.cx_lowest, updated when /etc/rc.d/power_profile
runs on losing or regaining mains power. However, that won't help here.
> We're already there. The document described some other setting which
> could be read:
>
> [root@zfsguru /home/ssh]# sysctl dev.cpu | grep cx
> dev.cpu.1.cx_usage: 100.00% last 5us
> dev.cpu.1.cx_lowest: C8
> dev.cpu.1.cx_supported: C1/1/1
> dev.cpu.0.cx_usage: 100.00% 0.00% last 4us
> dev.cpu.0.cx_lowest: C8
> dev.cpu.0.cx_supported: C1/1/1 C2/2/117
>
> I don't inderstand this. 100% CPU is my main issue, created by
> {acpi_task} in the kernal. However -> CPU1 supports different states
> as CPU0? Or is this a summary of last states?
I don't follow this either, and don't recall seeing different C-states
available on different CPUs? If cpu1 has only C1, I can't see how cpu0
could ever use C2 - with its real win in terms of power consumption - as
all CPUs are now set to the same C-state (and P-state) as far as I know.
Is cpu1 a real CPU, or HTT? Perhaps show the CPU detection details from
dmesg. powerd with standard parameters will always run at top speed
with the CPU usage/idle figures you quoted; you could get it to run
slower if you adjusted -i and -r settings, as an immediate workaround.
But listen to John about debugging the ACPI tasks CPU usage issue ..
cheers, Ian
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